There are more options to fix your problem with bad decayed teeth. You may need to have denture without implants. This treatment has been around for years. Implants are the best option but not in the budget for some people. Get an opinion for dentures.
You have a solution ,and its called dental tourism, its the must affordable solution you can find,and you will find the same quality and care, many patients travel abroad for dental tourism.you can find this all on4, procedure by one third of the price.
it's unfortunate that you grew up in such a difficult situation. Implants and all on 4 dentures are the Cadillac of treatment but not without their problems. If you still have your teeth you can easily have your teeth removed and an immediate placement denture. This will not have the rigidity of the all on 4 but it should be a very functional restoration. In the future if your financial situation changes you can always have implants placed and a new denture made.