
Long answer coming up!:-)
We've done both, graduating from a tent, then a caravan and now a motorhome. We are currently on our second motorhome. TBH I think a motorhome is really a lifestyle choice. The outlay for one can be high, the front bit requires servicing and MOT, the back bit needs an annual habitation check to make sure the gas and electrics are working properly and safe and there is no damp coming in anywhere.
We currently have a small motorhome having downsized. Big motorhomes are hard going on the average British roads and parking can be a nightmare as most council run CP's have height barriers. However by downsizing we have also compromised more. We don't have a fixed bed, I regard the fixed bed area as a waste of space as it can't be used for anything else. We have a van that has side seating benches long enough that they can be used as single beds as it's takes two minutes to set up for the night. Think carefully about storage as it's amazing how much clutter you end up taking with you and as mentioned above, it needs to be packed securely away before travelling. Check out motorhome forums such as motorhomefacts as they have lists of things needed in your van, also a good forum for advice generally.
We sometimes tow our small car behind our motorhome which means not having to worry about packing up the van before going out every time. It's a nice combination to have as we can choose whether to go out in the car or in the motorhome.
My advice is to think very carefully about whether a MH or a caravan is more suitable. If you prefer driving to an area and staying there for a week or two, then a caravan is better, or if you like constantly moving on, then a motorhome will probably be more suitable.
Go to the caravan and camping show at the NEC and look at both MH's and caravans and see what you like, not only for you to choose which will be better for you, but all the different designs of living accommodation. When you narrow your choice down to a few types of MH, check out the second hand market as it's rare that someone will stick with the first motorhome they buy and you will find plenty for sale without many miles on the clock. We bought our second van at a year old with less then 2000 miles on the engine.