Along these lines, the metal required to fabricate a few make shift squat/bench stands is inexpensive and even if one does not know how to weld, the labor is relatively inexpensive.
If this, for whatever reason, is not an option, then a planning change may be something to think about such as:
Mon morning- upper weights, Mon afternoon- speed work, jumps/throws
Tue morning- Lower weights
Wed tempo
Thurs morning- upper weights, Thurs afternoon- speed work, jumps/throws
Fri morning- lower weights
Sat- tempo
Sun- off
But I would first recommend the scrap yard squat/bench stands and perform all auxiliary weight training the morning after the speed work.
By comparison, when I owned my own facility I bought the metal for 6 full power racks and benches and only paid $1200 (US). My wife and I bought the lumber, foam padding, and upholstery and upholstered the benches ourselves and a friend took care of the drilling and welding for the racks and bench frames.
To only make squat/bench stands, as opposed to full power racks, and benches would be much cheaper; and you could even get by without benches and floor press right their on the track.
Aside from ebay and classifieds, if you are in the US you can get used barbells and weight plates (even bumpers) at www.playitagainsports.com for very cheap