^ This. Remember, you don’t need to do everything at once!
Cleaning is the cheapest form of restoration, and anyone can do it (hint: recruit those kids - they have tiny fingers for getting into nooks and crannies).
Getting it back on the road is the BEST form of motivation. Driving and enjoying it will keep up interest and make you want to improve various aspects of the car.
I tend to do small / short term / weekend projects during the “driving season”. Cleaning, simple fixes for basic components, replacing / repairing worn out trim, etc. This is the time you want to be using the car, not putting it down for work that will take weeks to finish.
Save the big / long term projects for the “hibernation season”. Bearings, gears, radiator, brakes, carburetor… If they are functioning adequately, but could use some work or improvements, schedule it for the coming fall / winter months.
Now, this kind of assumes that the car is generally road-worthy already. Yours may not be there yet, so it could be that NEXT winter will be your “hibernation season”. You will probably spend the rest of this summer getting the brakes and carb and cooling somewhat sorted out. If you time it right you could be doing some “shake down” driving this fall and be able to do a good evaluation on the condition of the major components, while making that winter “to do” list.
Value? I’d have to agree with the general assessments of $3500-5k or so - high end if it can run off a fuel bottle or move under its own power.
Cost to repair and make road worthy… really depends on current operational condition, but I would budget about $3k for starters.
That should give you enough for parts to repair what you can on your own, and some money to farm out an item that you can’t do yourself.
Body and paint will probably set you back $10k or so for a basic “20 footer” sort of paint job, and basic rust repairs.
Value when completed… $10-15k ish? For a presentable driver, as a guestimate.