That's one of the reasons people like Bitminter. Doc answers pretty much all that's asked of him and in a timely manner too. Issues are dealt with promptly and quickly, both with peoples gear or the pool itself. Operators don't come much more reliable than that. At least you know that Doc's going to pay out when blocks are found. If Bitsolo won't answer any requests for information about their pool then it kind of makes you wonder.
I don't know what's involved in solo mining and didn't realise that you needed the whole blockchain.
One block a month actually does sound pretty reasonable. Someone would get around $14,700 or £8,855. The pool would get $1,280 plus transaction fees merged in the block. Again I'm not too sure what amount on average in BTC is included in a block regarding transactions. That would be based on the finder getting 23 coins from the block. The pool could also get the NMC payout from merged mining.
I would chuck all my retired gear at the solo pool, and I honestly think that 20TH/s wouldn't take long to achieve. The more the hash rate rose on the solo pool the more block finds you are possible to get. 40TH/s and you may get a couple of wealthy people per month. Depending upon what you consider wealthy to be.
On a side note I'm in the U.K. and I'm just getting ready to settle down with my Vodka, sorry family for the evening, and I've just noticed your clock on your mac mini, it looks like you are in the USA. East Coast at a Guess. LOL. Never was any good at Geography.
Jacko