You can get away without the generator. We haven't used our in years. So far our solar has been larger portables and 230w had no issues running the trailer. 440w let us use the coffee maker and microwave. With 3 panels/ 750w we run a small A/C and cook on a hot plate directly off of the solar. We have a big bank but really a grp 27 carrys us over night.
It is my experience with several different types on mono and several polys that the polys do better in lower light situations.
You can pick up the bigger panels on craigslist here for much less than online or in a shop. With up to a 275w panel you can use a $100 20 MPPT controller, a $50 set of MC4 solar cables and a few other bit for a basic system that will do well mounted or portable. I use to list the same for $500 each on CL, they sold well. I have picked up my panels for $50, $85 and $175 each.
I still have my first 230w portable. The whole thing cost less than $200 an is good for 1-200 Ah on a good day. It's great for keeping the batteries up over the winter or catching those morning rays while the flat panels sleep.