$50 Paint job on my pop up Apache RV

I read and read about how to paint my Royal.  I don't have a lot of money to spend or a garage to paint in.  I have a carport with our cars and the neighbors cars.  

I came across the $50 painting method.  

It requires a firm 4-6 inch white roller ($2), a foam brush (.50c) and Gloss Rustoleum ($7) paint, mineral spirits ($4,) a tack cloth ($2,) and 600-1200 grit wet sandpaper ($10!)  

Google $50 paint job to read gobs about it.  Basically you prep really good by sanding, priming, sanding, washing, wipe with mineral spirts, a tack cloth.  Then you do 1 cup paint and 3/4 mineral spirit.  You roll on in the thinnest coats possible and let it dry 5-6 hours.  Then wet sand, wash, wipe with mineral spirits and tack cloth and then do it again.  

This is coat one- it was nearly dark when I finished.

 It looks terrible because it doesn't cover green with the first coat, but it is smooth.

 We have a heat advisory today so I woke up early to get sanded, washed and wiped to put on the second coat.  The 600 grit smoothed it all out like glass.  

The coverage is much better with 2 coats:

 Close up of doors-

 I think after 5-6 coats, it should look great.  

It takes 90 minutes to sand, wash, wipe and paint.  Not too difficult.