For big tank, the amount you state should be for a 2nd hand tank set, please remember to set a side around 200-300 for delivery of tank depending on how big your tank.
For equipment, depend on your budget, technology is improving and china brand is getting better but for the china brand, luck is very important. If lucky can last 1-2 yrs. if not then 1-2 week problem surface. Euro brand is super ex but super reliable, luck is not a factor.
When your sps collection start to get serious and more exotic, and not at home most of the time or need to travel often. Reliability becomes super important.
Ultimately think carefully and know what you want before you start buying, all the best. =)