Question 3, do you need a cabinet and complete set up, ie, filter and heater incl. in price.
Hint 1. Remember that settling for a smaller (brand new) tank to save money in the first instance is false economy as you will only end up striving for a bigger tank which will mean selling the smaller one for peanuts Always best begging, borrowing or stealing (don't condone the latter) to get the absolute largest tank you possibly can from the outset
Hint 2. Better to answer the 3 questions then just ask members to suggest setups and maybe your location area for second hand bargains