That is a great start! Just remember repair and maintenance. You will not be if you extended your budget to its limits for your payment and wind up with an RV that is no more than a rather costly yard ornament because you can not afford to make the payments and appropriate money for repairs. You will be wise to set your budget to include setting aside a few dollars each month for repairs and maintenance. You will also want to work out into your budget things like licensing and insurance and for some RVers, there will be habitual storage fees and camping association dues. Keeping all of these costs in mind when it comes time to deal with making your motor home purchase decision, will be the best way to gain what you want AND savor it for many years.