A single stage press is not a bad idea for other reasons not mentioned yet. Bottleneck rifle cases will eventually need to be trimmed to length. They grow in length with usage. I do all case prep off a progressive press. So I deprime/resize, trim (if needed), clean before i start to reload.
Digital calibers are a pain due to dead batteries when least expected. Get analog.
It sounds like you are going to wet tumble your brass. I have found you need to deprime your brass before wet tumbling. If you wet tumble before depriming , the primer/primer pocket is the last thing to dry out. It is possible to put in a fresh primer before the primer pocket is completely dry. The moisture/water left in the primer pocket will kill the new primer. Next if you deprime after wet tumbling, it is very likely that the primers will not come out as a whole. Many,many times I have deprimed and just the end of the primer is broken off and the round circumference stays in the primer pocket. For unknown reasons this happens frequently when wet tumbling before depriming. Recently I was depriming after wet tumbling and had 16 primers where just the end was dislodged. This was most common with Winchester primers in Winchester cases. Go figure. Also wet tumbling after depriming will allow the primer pockets to be cleaned.
I have found Hornady's case lube to be superior to others used in the past. Also you will need some neck brushes to lube bottleneck rifle cases while resizing.
With wet tumbling there is no need for special case cleaning powders or liquids. Some dish detergent and citric acid( Kool-aid, lemon juice, Lemi-shine, etc.) is all that is needed.
There is a ton of reloading videos on youtube. Many are from vendors about their specific products.
There is no need for special lighting for a 550 press. With pistol cases you can see down into the case without special lighting. Just my .02 cents.