I use solder paste and a hot air rework station for the 2nd side of my two-sided boards. I use a griddle for the first side with the most components. The smallest I go are 0603 components. I manually apply solder paste to a group of pads I’m soldering, lay the parts down and apply heat across the pads. You have to be careful that you don’t scorch your PCB though. Just have some patience and you’ll be fine. Also, keep the airflow low or your parts will fly off 