Not sure if you got anything yet but, I am building a system on a budget also. Petsmart is going to have their ensembles 50% off on black friday. I am going with the 75g tank, stand, and led light for $250. I have heard that this is a great size to start with if room allows. They will also have filters half off. So I will be getting a emperor 400 for about $35. I ordered dry rock from bulk reef supply got 60 pounds for $175. I plan on buying 10 pounds or so from lfs to help seed the dry faster. I know the led that comes with the set isn't good enough for coral but, you can't put them in right away anyway. It will be good enough for getting the tank cycled which will give me some time to get the coralife t5 I am looking at. If 75 is to big they have a 56 colum that I was going to buy before I found out about the sale. It is normally $319 for tank, stand, and led light. It will also be half off. I looked at some used tanks but, with these prices I don't really have to gamble buying somebody else potential headache. I plan on adding a diy sump later as funds allow. After I get my light I will probably have a total of $900 to get started that's buying water from lfs. I really think it will be closer to $800 but allowing extra for some things i might have overlooked. My budget starting out was $1k because of black friday I get a nicer tank for that money. At first I was worried about using the emperor 400 but, I have talked to several people that use them without issue. One of our lfs has had a 125g running one for about 12 years with lots of coral and fish. Thai made me feel better about it. If you did a smaller one of the sets with one of the good hob filters they will have you could get way under $700 to start. If you went with the 56 tank set and filter would be under $200. Then just have to shop smart for the rest.