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I admire your loyalty to the bike, how many miles have you done, of the 50K? Your maintenance schedule is a good idea, you need to understand that you're likely going to be dropping $XXXX into it, depending upon the extent you go-to.
Coolant hoses: why are they leaking? Replacement with OEM hoses/clamps should have solved most issues, though places like the water pump and the L-pipe, and its O-rings needing disassembly/replacement of the O-rings, maybe a new pressure cap, and whatever-else to set things right, then a re-charge with aluminum-friendly coolant, is going to involve more in labor than parts.
"Gas tank floater is stuck," sounds like a gas tank removal, cleaning, and possibly a sealing, or a replacement ($309), and replacement of the sending unit ($37), could be $400+
2006 Yamaha V-MAX 1200 (VMX12V) Fuel Tank | Ron Ayers
Brakes: two HH compound pad sets from an aftermarket source, probably $45 pair, HH pads aftermarket, $41 OEM compound (I recommend the HH aftermarket from Vesrah, EBC, SBS, or another quality supplier)
2006 Yamaha V-MAX 1200 (VMX12V) Front Brake Caliper | Ron Ayers OEM rear brake pads $37
2006 Yamaha V-MAX 1200 (VMX12V) Rear Brake | Ron Ayers and seals (front OEM 2@ $26=$52; rear OEM $27) for the f & r brake calipers, necessitating disassembly/cleaning, labor, front brake master cyl rebuild kit $38; hydraulic clutch master cyl rebuild kit $30
https://www.ronayers.com/oemparts/a/yam/500456acf8700209bc793153/front-master-cylinder-1https://www.ronayers.com/oemparts/a/yam/500456acf8700209bc793154/front-master-cylinder-2
then a complete flushing of the f&r brakes, and the clutch, and don't forget the clutch slave cylinder rebuild (piston seal kit OEM $26, pushrod oil seal OEM $5) I don't have a flat-rate book for labor, but I'd say brakes and clutch, 5 hours minimum.
Then do you want to install new clutch friction discs (OEM recommended, ~$11 apiece)?
2006 Yamaha V-MAX 1200 (VMX12V) Clutch | Ron Ayers
Assuming you can re-use the 'steelies,' with a roughing-up, probably all else you would need is the clutch case cover gasket (OEM $9)
2006 Yamaha V-MAX 1200 (VMX12V) Crankcase Cover 1 | Ron Ayers
Now, the suspension: are the fork seals leaking? Fork seals (OEM 2@ $27) and dust seals (2 for $30 total); some fork oil $20 or you can use ATF, (cheaper) call it 2 hours labor.
Assume the rear shocks are OK, if not, a decent set of aftermarket rear shocks is probably ~$300 and you can spend $1,000 for some Penske shocks, though 412 Progressive Suspension shocks should get you by. Rear shocks are pretty-quick to R&R.
Carburetors: to remove disassemble, ultrasonic clean and replace parts, and reassemble/install, you could easily spend $800 if you needed new slides & diaphragms, a gasket set, new float valve seats and valves, and replacement of the rubber plugs in the jet blocks, etc.
https://www.ronayers.com/oemparts/a/yam/50042e2cf8700209bc78a2cc/front-fork
Changing engine oil (oil filter), differential oil, and spark plugs; gas filter (aftermarket canister is OK, call it $8, or a Russell replaceable element one $20), an air filter (OEM, $25)
1989 Yamaha V-MAX 1200 (VMX12W) Air Filter | Ron Ayers could run nearly $100 in parts.
You see that to perform a complete and thorough go-through could run you close-to $2,000. However, that's the kind of service that should allow you to experience many thousands of miles after that expenditure. Hopefully your second gear dogs aren't rounded-off, that's probably $2,000 minimum, if you could find a Yamaha dealer willing to-do it, and they might require half-down.
Faced with your situation, I'd consider a call to CaptainKyle in TN and a road-trip to get the bike down there before the snow starts. If you were in the Midwest, I'd say visit Sean Morley in Derby KS.
Yes, it's a big expenditure, but there's no-point in doing some stuff, and then facing a lay-up because you developed a problem in one of the systems I mentioned, and we haven't mentioned tires or a battery. Installed those are probably $300.
What do you think?