A regular construction type gen is a lot louder than an inverter gen, but cost about 1/3 of the inverter gens. Tractor Supply has the 4,650/4,000 on sale for $335 where as your inverter gens of that size will cost upward of $1,300. TS also have smaller units by Champion for really low prices [3500/4000 for $299]
If you just want a gen to recharge your batteries, then a 2,000 Watt unit would do. Very small and light weight. About $175 last I looked.
2013 Silverado 2500 HD Duramax/Allison Tuned
Aviator Wright Flyer #1919
"First In, Last Out". 11B4Y
DAV, MOPH, VFW, 5/7 Cav,1/8 Cav Assoc.
11th ABN Pathfinder Co. N7MIP