I just helped a friend get set up on a budget. He got a mars hydro 2x4x6. I wouldn't recommend anything shorter than 6'. If you have the luxury of waiting, mars runs some great deals and promo codes on their eBay store from time to time. His tent wound up being just over $76 a few weeks ago. For ventilation we got a delumee 4" (200 CFM) variable speed duct fan/filter combo currently $118 at Amazon. Filters are replaceable at good prices. Despite their inexpensive price, I have no gripes so far. I have a 4 and 6 inch. I find the concept of integrated fan/filter a great idea. I jut wish ac infinity would do this. I have a viparspectra 1500 and am pleased with the quality and results. That said I'm going to toss a bone here. We got him two 100w lights on Amazon for around $55 each by the name of imsincere. They had good reviews as well as a thumbs up from the MIGRO YouTuber. Only gripe there is that the hanging hardware pulls the 4 corner cables to a single rope ratchet but that is easily remedied by simply getting another pair if rope ratchets. Another killer cheap light that sports 756 diodes in a 150w is by hyperlite and sells under the name of groplanner. I think they're going for $99 on Amazon now with a 50% off deal. Sadly I'm only seeing the app dimmable version at this time and not a big fan of it. My wifi is kind of glitchy and that isn't cool as in my experience a loss of wifi and the light fails to follow program. I have several manual dimmer versions and they're great. I throw all these deals out because I know how fast stuff can add up. A body can always upgrade tents, fan/filters, lights, etc. Depending on the budget, my typical MO is to save where possible without compromising much on quality of big ticket items then using the savings for the ability to purchase higher end in other areas like ph meter, clip fans, etc. This hobby can dollar one to death in short order.