First off, buy you a good used 3/4 truck for 15,000. Then seek a used 28-30 ft fiver with one slide. You can get them for 7500.00. Put new tires on both the truck and fiver. 500 for the trl 1000.00 for the truck. Now you have 23-24,000 in both the truck and fiver. You are not going to find a moho in the same condition without a toad for that kind of money.
The thing you don't mention is in calif , you are going to pay upwards of 65.00 per night for a decent park.
The insur and both will run you about 800 per year.
Comparing a fiver/trk combo to a tt/anything or moho is like comparing apples to lemons. No such thing. A truck fiver combo gives so much more more, value, resale and ROOM/ROOM/ROOM, there is no comparison .