I'm not sure it is possible to answer all of your questions ...
Distance will depend to a great extent on the arrows you use - I use a 55lb@28" Bickerstaffe Classic Bow and normally shoot (for clout) some Bickerstaff arrows with 2" fletchings, 11/32 shafts and 125 gm tips. I can get a comfortable 200 - 210 yds with these and not overdrawing the bow.
If I use some previous clout arrows with smallest fletchings (1 3/8") fletchings, 5/8 shafts and 100 gm tips I can add 20 yds to this - but I normally only use these if very windy (less affected by wind).
I am just about to get some footed/barrelled clout arrows (more because they look nice than I need the distance) and would hope to squeeze another 10 - 20 yds out of these - I will be interest to see.
Obviously technique and the actual bow have a considerable impact - but I would be confident that you will have no problem with 180 yd standard clout distances.
My standard spining calculation (but I am no expert) would be 40/45 for 28", 45/50 for 30" or 50/55 for 32" arrows.
For questions 2 and 3 have a word direct with Pip - he is always helpful (particularly if you are buying "several bows"). He also makes nice and reasonably priced arrows which he will match to your bow(s).
Based on our club's experience to date - you can expect many years of use from Pip's bows if propery cared for.
The main reason for posting though is to congratulate you on an excellent website - I was surprised to see this interest in Russia (I would not have thought of Russia as a tradional archery enthusiasts haven - I have taken the opportunity to add a link from our own site (
www.cloutabout.com) to yours, as I am sure our members and visitirs will be interested).