You almost need to have those warm weather plants in portable wagons or something to move them in doors or something.
I have sometimes used row covers and incandescent light bulb to keep a grouping of plants warmer during the night.
I’ve always wanted a greenhouse, but our property is very hilly, stony and heavily wooded. Where the house is positioned it then slopes down about 15 feet and then even further after a slight flattening, then down another 10 feet or so to where two streams converge. Our neighbors on the left are up at least 25 feet to their driveway, and then up even further.
I love it, but the back deck is eight feet off of the ground and the front slopes precipitously. We call it the “vale”.