Make a budget, and then figure on spending double.

I bought a used tank and stand on a running system...figured around $600 the whole thing would be back up and running....I had another thank to steal from for goodnessakes! .....4 Months later....$1700 gone and still not finished (although getting closer!).

Costs run up as you realize that it makes sense to buy decent equipment first time around rather than buy things twice.