I'll just pick a couple of Qs, I would get a poo sample mixed up from the two of them and get your vet to analyse it, they will be able to tell you if they have worms and what type and recommend the right wormer if needed. Some people routinely drench but if you have a decent area and low numbers you are less likely to need to do this. Same with fluke, drench if you are on wet land or have the poo analysed for that too and get a positive result, (tho it doesn't always show up so negative not a guarantee of being free of it.
I would recommend an annual jab against clostridium diseases, using either lambivac or eg Heptavac P+. however smallest bottle is twenty or so doses I think, so see if the vet can help put you in touch with someone who might want to share NB this sharing might be strictly not allowed but if it gets the animals treated.
I would consider shearing yourself, it is fun with a couple, ESP if you are last in line for a shearers time, better than worrying about fly strike. It's not hard and the shears are about £12 ish.
You might be able to show in local shows, it depends on the show organisers. The lady who owns the (registered Shetland) ram I borrowed for my girls wants me to show the lambs at a local show to me, even tho They aren't register able because the ewes aren't registered, she seems to think this will be possible. You will need to check the schedule once it's issued or ring the secretary.
There are hatters for sale on eBay, I would think Ascott smallholding supplies might also have them, tho not sure.