Since it sounds like budget is an issue, I advise don't go whole hog right at first.
get in contact with a local skilled arborist, and start getting familiar with gear and techniques. They may even have an older saddle they don't use to get you started.
My point is your wants are going to change like crazy at first as you learn, and buying all your gear before that point will end up expensive.
The kits can be a good buy, but with any kit unless you know you want exactly those components you may be sorry.
For example, tastes in ropes and sizes is all over the map depending on use, etc.
As is pads for spurs, a really personal thing.
As is harnesses. And with each one it really depends on what you want to do with it, which will certainly evovled very fast.
If I had a ton of money and just wanted a starting point, I would buy 150 ft of bluemoon, a tree motion saddle, and spurs with the ultra stiff pads (they are not rigid -- that is what they used to call them, I was told they are now called something else. two straps, well padded and have a metal insert inside that you custom form to fit your own shin.).
Esp with saddle and spurs, you need to go somewhere that sells them and spend time with them before you buy.
