I did my scuba diving course during the communist times in the Czech Republic 25 years ago - the equipment was quite rudimentary, and the conditions very hard (no visibility, cold, ...) but the experience was absolutely extraordinary anyway (in fact much stronger than all scuba diving in exotic lands I did later). Since then, I scuba-dived in different places all over the world, with much better equipment, but I have to agree with Vali, that in fact I always enjoyed freediving more. Only in the last 2 years I re-discovered the good old "communist" feeling during scuba diving - together with my brother we started to dive again in the Czech lakes and quarries with just a naked tank and a regulator. It brings a "Cousteau-like" experience, and it is actually rather close to freediving. And it is not expensive at all. 20 years ago, I've got a tank with a regulator for free from a German friend, who after buying it, found he did not really like diving (or could not dive for some reason). It is still good (revised, of course), and serves fine, so you can tell it was a really excellent investition
But recently we actually use just 5 litres tanks which are much less bulky. And since the most interesting diving is in shallow waters anyway, we can easily keep an hour or more with it under water, and have plenty of fun, and for very cheap.
You can get a used or even a new tank for a few bucks, and the refill is not that expensive either. And if you have some friends in the community, you can usually get a good deal, or sometimes even some free fills.
Yet another possibility is becoming a divemaster - not only you can dive each day for free, but you become a very strong man (or woman), due to the carrying of all those tanks of your customers.