Greetings Elizabeth and Tom!
Welcome to the Forums!
A 1975 Airstream Tradewind (25') coach would have come standard with a Bowne (Atwood) water heater. The water heater was typically located on the street-side just rearward of the rear axle -- it can be identified by the smallish rectangular access door with a small rectangular screen in the upper left corner of the door. The standard water heater would have been LP fired with a manual pilot light (the coach MAY have a water heater bypass that would keep water from reaching the tank if in the winter position which allowed anti-freeze to be circulated through the pipes without filling the five or ten gallon water heater tank).
If the coach doesn't have its original water heater or if the existing heater does not work it is a relatively common replacement. A new six gallon water heater can usually be installed for around $750.00 depending upon local prevailing labor rates.
The hole in the bathroom floor below the vanity is reason for concern. I can think of two explanations -- a drain pipe leading to the gray water tank is missing -- or there is floor rot (not uncommon with this era coach) which would need to be addressed as it is quite expensive to repair if there is extensive rot. The rust in the rear compartment points to potentially neglected maintenance/leaks that could be a source of floor rot.
The dent in the very lowest front streetside corner involves the banana wrap which isn't uncommon. The dent above the trim strip involves a panel that would be expensive to replace if you can't live with the blemish. The LP tanks appear to be original and it doesn't appear that they have been brought into compliance with the requirement for OPD valves (certification and new valves could run around $75 for the pair). The curbside awning is a Zip Dee which is a definite plus.
Since the used car dealer who has this coach didn't have the ability to identify that the coach had (or should have) a water heater, I would be suspicious of any undocumented statements made. If you are serious about this coach, my suggestions would be to ask that the operation of systems be demonstrated (or guaranteed in writing
if you have that much confidence in the dealer) -- those that can be the most costly to repair replace would include:
- Air Conditioner -- a new air conditioner installed can cost between $1,000 and $2,000 depending upon unit selected and prevailing labor rates.
- Refrigerator -- a new Dometic refrigerator installed can cost between $1,000 and $2,000 depending upon model selected and prevailing labor rates.
- Water supply pump and plumping -- costs can vary greatly depending upon the extent of work/repair needed. A new PAR water pump can run as much as $500 with installation (a rebuild kit can be had for around $50).
- Furnace -- a new furnace with installation can cost between $775 and $1,000 depending upon model needed, modifications neede, and prevailing labor rates.
- Water Heater -- a new water heater can cost between $775 and $1,000 depending upon model selected and prevailing labor rates.
The price being asked for this coach is high enough that I would expect that it should be camp ready with little additional needing to be spent. Apparently, a new water heater is needed at the very least. With careful examination and some negotiation, the coach could be a decent deal.
Good luck with your investigation!