Why is switching gyms not really an option?
If you do decide to build a home oly gym, all I'd say you really need is a bar, bumpers, platform, and some squat stands (or a rack). I wouldn't recommend cheaping out on the bar or the bumpers, spend the extra money to get a bar that will last a lifetime, and bumpers that won't break after repeated drops. If you're handy at all you should be able to build a platform yourself (you can probably use google to find some blueprints for a DIY platform). Maybe if you know someone who welds you could get them to put some squat stands together for you for a case of beer or something.
Or just check out one of the clubs on the USAW site linked above. Probably better to lift somewhere you can get coaching anyways, especially if you're just starting out.