You can also buy used if you want to save $$$. I picked up a real clean 2002 23' Coach House for 25% what a new one would cost. I'll probably invest $4-5K into doing some upgrades, but I feel I'm still money ahead even if I get some unexpected repairs. With my upgrades I will get Bluetooth, NAV, Sat radio, 2 backup cameras, 40" TV with Blu Ray player w/300W inverter, 200W solar and a 4 stage charger.
I figured 30 days of hotels and meals will run you about $4500/mo. Use the RV 3-4 months out of the year it makes good sense. And we haven't even talked about the travel comfort of traveling especially with a dog and the conveniences of having your home on wheels with you.