Even with your (relatively low) budget, I think it would be money well spent to hire one and see if the reality lives up to the dream.
We have owned moho's for years, as did both our sets of parents although it was noticeable that my parents used theirs much more than my IL's.
My parents would be on the content for several months of the year, just popping back to sort out life admin before shooting off again. When in the UK they would go away every week for a couple of nights
They bought a brand new Moho every 2yrs (they never had to get an MOT) and when traded in for the next one, they had covered 20-30k miles but the MoHo's were always still in fantastic condition (they knew how to look after them).
We buy new but tend to keep them a bit longer, current Moho is 1yr old and we will probably keep it for 5-6yrs when we will look at replacing it.
Do your homework and decide on the layout that suits you.
We like a central dinet/lounge with a separate rear U-shaped lounge, gives us lots of space with the 2-Ddogs.
Tried a fixed bed once, BIG mistake! All that daytime space wasted just to save 2-minutes in the evening making the bed. We kept that Moho almost 3yrs but never liked the layout so we made sure that when we ordered out next one, the layout was our tried & tested format.
I sleep in the rear (U-shaped lounge makes into a beautiful bed) with the 2-Ddogs while my OH sleeps in the overcab bed which he says is superbly comfortable. This leaves the central dinet free for whoever is up first to prepare breakfast (this area makes into a third double bed but we never use it for this).
Drop down beds are popular and although we have had them we were not very keen, when down they do limit living space.
As for sites, we are long time members of CAMC and love their sites. Not cheap but nicely laid out, usually close to the places we want to visit, well run and spotless.
We use our Moho all year (UK only) but if for any reason we have not been away for a while, we go on day trips to a local point of interest and use the MoHo as a base while walking Ddogs. It makes somewhere cosy to warm up, have lunch or just a cuppa, on-board toilet etc.
Depending on the size Moho you go for you may need to check your driving license for C1 entitlement. Anything over 3500kg requires you to have a C1 and TBH, it can be too tempting to overload your Moho with all sorts of things you "might need" and find you are overloaded. Roadside checks do happen and you will be fined (and have to unload the excess weight).
We have larger vehicles which are rated at 4-4500kg but the good news is that the bigger, the cheaper your road tax (£165 this year)😆
Check your roadside assistance as many car orientated policies will not cover a MoHo. We have used Britannia Rescue for decades as the cover is excellent (all vehicles in household) plus they cover MoHo's up to 8m & 7.5t.
Where would you keep it?
Ours is on the driveway at the side of the house but secure storage is available from about £35/M (we put ours into storage when moving house plus when we were having building work carried out). Secure storage can make your insurance cheaper so it may balance out cost wise.
Running costs are not insignificant.
Tax, insurance (you may be starting a new policy with no NCB to transfer), MOT (if applicable), servicing, habitation service, tyres (due to the low use many MoHo's get, tyres can age & crack before wearing out) plus all the little jobs that crop up when you own a house on wheels!
Go for it and let us know how you get on.,😁👍