Hey Marinenoob,
Nice setup sofar !
Just a couple of comments , if I may:
1. Your substrate needs to be a lot finer. Crushed coral is not a great option as it will end up trapping detritus and lead to nitrate build up later on. Riyaad & Ben have already given you a good suggestion to replace the substrate.
2. You need to get more live rock. Even though your budget may be a bit tight, it is better to get the liverock now , than to add it in bits and pieces. Your cycle will take longer if you slowly add the rock , since you will get a mini cycle every time you add LR. ( Unless of course you are getting LR from a well established system)
3. Pay careful attention to the amount of flow you have in the tank. You need to aim for at least 30 times water turnover ( Water turnover = System volume divided by the flow of the return pump in the sump (if relevant ) + flow rate of pumps in the DT). Not super crucial at present, but you will need to pay attention to this aspect before introducing any livestock.
4. Last point on the flow : Make sure that your powerheads/pumps in the DT are positioned in such a way as to give a really chaotic flow. This will also help that you don't get any "deadspots" in the tank where detritus can settle and cause problems.
That's it for now. Enjoy your cycle , read a lot , ask lots of questions and most importantly ...... have fun watching the critters appear in and on your LR.