Keep your eye out for some sort of a multi bulb light fixture we can turn into a grow light. Maybe even a few of them. I know you’re on a budget, so anything you can gather or salvage without tapping into cash will help.
Electronics are good to salvage too. Old computers, game systems, or even phone/battery chargers lol. Most will contain small fans, heatsinks, and power supplies that can you may be able to use at some point. If nothing else, some can have some scrap value that could earn to potentially go towards your grow.