If cost is an issue you could always buy a tank & stand second hand from eBay. You can make a big saving buying second hand. Then if you feel your DIY skills are up for it you could try making your own sump made to measure to fit inside the stand. I got a 3ft Eheim tank and stand for ?90 on ebay in excellent condition. Then went to a local Glaziers and got some offcuts of glass for ?25 (all cut to size with bevelled edges) and some silicone for ?5. Im sure Ive seen some instructions how to construct it somewhere on FK. If youve got the time to do it yourself you can save a fair few ???'s.