No problem, glad I could help to some degree ^^;
I can understand. It takes a lot of time and effort to make any part of a fursuit. Thereare fursuit makers out there who will only take full suit orders or partials, but indeed not make any separate parts. There are some out there, however. Maybe you can look into fursuit making groups. Like on deviantArt and FurAffinity and ask around if they know anyone who would make digitigrade feet paws.
The problem you mentioned that is has to be connected somehow is an important one with digitigrade legs, yes, but there is always a solution. I have digitigrade legs on one of my suits. It's a 'shoe' part and the leg part, the latter is attached to the body suit. It's not exactly how I envisioned it, but it works. Maybe you can do something like that for you; have the foot base a little 'bigger' so it seems like it's just the toe-part you are standing on, and then work up from there.
Or, maybe have something like boots. Or something else and have them attach with straps.
What part of the suit would be 'attached' to the digitigrade legs? As in, what do you already have of the suit?
As for doing much else other than walking; That is usually the case with most fursuits anyways. But that really depends on how the feet are made and how agile you yourself can be.
The first few times in my fursuit (the one with the digitigrade padding) it was really weird walking, because I also have silicone padding underneath (paw padding), and I needed to get used to it, but now I can sort of run in the suit. I would be able to do much more if I wasn't limited by sight and by the huge heavy tail I have xD
As I said, making a fursuit (or even just the parts) can take a lot of time. It's often not really the materials that cost that much. It's also that you want something different that most probably have never done vefore either.
All in all the cost is approx. the amount that I would have guessed, but I would indeed keep looking if you can find someone else that still delivers good quality but might make it for a bit cheaper.
There is also a chance there might be (a ) fursuitmaker(s) where you are, so that could lessen the cost transport-wise. If you're interested in getting any names, I can mention a few but they're mostly famous fursuitmakers. However, I commissioned a fursuit from someone reasonably closeby and they still made very nice quality fursuits too.