As far as lighting goes there is a more budget brand of led
out there that has worked well for other members, I believe it was taotronics brand. Another worthwhile investment is a rodi
water filtration system but that can come later but be sure to buy rodi
water as tap water is big factor for algae growth. In reality all you need to get into a reef tank is a tank and water mixed with salt(proper marine reef salt not table salt or regular aquarium salt) add some live rock ( dry base rock works also and will become live, best bet is to add 5 lbs of live rock to 25-30 lbs dry base rock) and power heads for flow. You will about 600+ gph
of flow likely from two powerheads so a couple 300 or 350 gph
powerheads should do you well, you can add higher flow powerheads which isn't a bad thing but I would suggest no more than 2x 500gph. A skimmer isn't mandatory but it helps so you could get away with buying that a little later just make sure to monitor your water parameters and perform regular water changes. That leads me to the most important thing which is a test kit, I use and API reef master test kit and it is entry level for reef tanks. Next big ticket item is lights, led
is best but a 4 bulb t5ho light would be good for most coral a 6 bulb is enough for pretty much anything. With all those items and regular maintenance you can have a very happy and healthy reef with or without a skimmer. I would also suggest going on YouTube and looking up BRStv they have a great bunch of informative videos and they have one series that guides you through starting a basic reef tank and progresses through all the upgrades you may want to do down the road.