Don't forget about insurance. We had a TT and now a MH. Our MH insurance is not a whole lot more an the TT insurance was for the year. Plus we had the truck insurance which was more than the TT insurance.
As far the SUV prices. Is the price of gas going to go down in a year enough to offset the cost of the SUV? Or is it going to be worse and it will be harder to sell the SUV? How hard will it be to sell the motorhome? Also don't forget about breakdowns to any of the units that you are purchasing used. Will it need new tires? Will you have a blowout and have to replace a tire or two at a couple hundred bucks a pop? What happens if the a/c quits on you? Or the fridge? What if you do develop a leak? In any of them. What do you do if something happens to the vehicle you are towing with? Maybe you tear up the transmission or the motor blows. There are a lot of what ifs that you can not control.
RVing is not done because its cheap. It's a lifestyle. It can actually be more costly than staying in hotels. Don't forget about your rv park costs. I don't know what the going rate for fhu in a decent park in California is going for, but out here, you are looking at around $30-40 night easily. You can stay in a state park with just water and electric for $25 but you agave a two week limit and you have to move on. Most public (govt) parks are that way. Private parks offer monthly rates, but many of them have 10 yr rules on the campers. Keep that in mind. Also, if you are going to need the wifi or cell reception for work, then remember that more remote locations you may not get any reception on your cell at all. And wifi in parks are sometimes spotty and sometimes have restrictions on it and its use. And most of the time they are not very fast.