I've been doing stronglifts for about two weeks but I only have a bar 100 lbs of weights, so I already don't have enough to keep increasing for deadlifts, and I don't have racks or anything and its getting pretty sketchy to lift the bar over my head for squats and bench from the floor.

I can buy a soloflex off craigslist for around $200, including the leg extension, butterfly extension, and 400 lbs worth of weight bands, and it seems to be able to do everything I'd need and more. Does anyone have experience with soloflex and how would it compare to free weights? I'm 16, 5'9, and 130 lbs if it matters. $200 is about the most I'm willing to spend right now.

https://www.soloflex.com/store/classic-soloflex/classic-soloflex-muscle-machine-with-butterfly-and-leg-extension.html