there are many threads in this discussion group about full timing which should provide you with a wealth of information. Rather than rehashing old arguments, I will only comment on the most important issue; make sure to read the fine print of the manufacturers warranty before putting your name on the dotted line. Many manufacturers do not warranty their product for full timing, 24 x 7 occupancy, residential living or many other phrases that imply that you are using the unit to live in full time. The reason for this is that building an RV for use 3-4 weeks a year allows the use of cheaper components, framing, engineering, etc when compared to building a rig for 24x7 occupancy.
Do a search on the term 'full timing' on this forum and you will get many threads to read through covering the topic.
Stuart, Lynn, Robbie and Abby
2012 102-F41RLTSS New Horizons Majestic
2013 F550 Super Duty w/Utility Bodywerks hauler body