It took me about 3 months only working a few hours at night after work. The kit is a 1/72 scale Academy B-17 F Memphis Belle and the 1/72 scale airfix  USAAF resupply vehicle kit. The base was made of green insulating foam board That was carved and painted to look like concrete slabs. I use Plaster of Paris and paint for a mud. The grass was applied using a static grass applicator. I purchased 1/72 scale, oil drums, and use cigarette rolling paper to scratch build a tarp over them, using jewelry wire I made refueling lines from the truck to the bomber .