First photo looks like sunburn on the leaf. The others look OK to me. Main thing is to understand their native conditions, and come up with something that approximates it in your environment.
I never worry about roots much, ex-flask roots will not survive, in general, but will be replaced by roots adapted to whatever growing medium you put them in. The main thing is to keep them in an environment conducive to new root growth, and supportive of the seedlings until they do make new roots.
To use beer: take a bottle of beer (your preference) and a hammer to the plant area. Find a slug, then slug the slug with the hammer. Then take a slug of beer. Repeat until either slugs or beer are gone.
Probably herding scale or mealy bugs, as Guldal suggests.
Two things to do: check (and kill any found) for bugs, and submerge the pot in some water with a little soap or other surfactant. This will force any ants that have taken up residence in the pot out.
I have plants labelled Specklinia grobyi with leaves ranging from long and slender to short and round, and things in the middle. Not saying it isn't, because I don't know, but I suspect that that name has been a dumping ground for unidentified species for quite some years...
(Taxonomy is a...
1. Phrag. Cardinale. Always does well. grows like there's no tomorrow. Close second this year: Paph. villosum.
2. Cischweinfia (any species). Always fails. Doesn't seem to travel well. I'll keep pushing that rock up the hill, though.
3. Biggest - Dendrobium Gatton Sunray. Longest held...
Ultrasonic sytems. House of Hydro has single emitter systems up to I think 9 emitter systems, which should be suitable for a small greenhouse. (I use one of the smaller ones for my cloud forest in a box.)
You can flower anything under lights, if you have enough lights. And space.
The real question is: Is it practical to flower this under lights?
That's a question only you can answer, because it depends on what space you have available.
Depends on the plants. Some species like warm conditions, and definitely enjoy the great out-of-doors. I move mine out. Others like cool conditions, and don't really do well with warm nights. They stay in the basement, under lights (and an air conditioner).
You just got to know your plants. If...
The colors are very temperature sensitive. Flowers that develop in cool to cold conditions have much more intense color than those that develop in warm conditions. You'd think they were different flowers.
Have a look at www.ledsupply.com. (Or any other supplier - that just happens to be the one I last bought stuff from.) It's easy enough to build your own these days. If your enclosure is 24", get an LED strip in multiples of about 20", and use several if you need. That's pretty much what I do.