Check in your local market mate. If you able to get the already built rig means that would be more easily to start mining bro. However,  the above mentioned cards and other products are enough to start mine the algorithm crypto night or daggerhashimoto.
Get the PSU according to number of cards you gonna add towards it mate.
Because if you add the more number of cards than the allotted number for the PSU you see the heat issue do check on it accordingly.