What about these then?
https://brew2bottle.co.uk/products/fermenter-king-gen-3-starter-kit?contact_posted=true#contact_formWould that let me dry hop and serve from my fermenting fridge right from the fermenter?
I dont have kegs or anything and to be honest and very reticent to expand until I can make a hoppy beer which is what I really enjoy drinking!
Yes it would work, but you will need two of them. The Snub nose or the Apollo would be the better option. If you can drink a batch fairly quickly then you can get away with one but you don't want your beer sitting on the yeast for too long. Try to approach brewing using the KISS method, trying to over complicate a process leads to headaches. I have said on more than one occasion throwing out a question to a forum will lead to varied answers making it more confusing.
Read Gordon Strong's book Making Better Beer, he uses RO water depending on the grain bill his salt additions are usually pretty much the same. No matter what he is making. What doesn't need to go into the mash stays out i.e the none fermentables. A couple of reasons, they can mess with the projected ABV and fermentation. Do a mash out and add the none fermentables or steep the none fermentable grains before hand.
Bottle tops scavenging oxygen? If there was such a thing the commercial brewers would be right on to it. The liners do scavenge hop aroma though, as does gelatin if you use it. The oxygen in the top of the bottle when filling wont be taken up by the yeast, they may use a very small amount but the yeast is in an anaerobic stage, so doesn't need oxygen. There is no need to add sugar with hops, hops themselves contain fermentable sugars, that is what plants do, they make sugar. For me, I dry hop just before cold crash, by the time that my beer is down to -1C the dry hopping is just about finished. So do some reading, listen to podcasts, until it makes sense, believe nothing question everything.
I had a drink out of this fermenter, 'Apollo' (the tap is on the top) it was a West Coast IPA, had been sat on the yeast too long could definitely taste the yeast and wasn't a good drink.