Ken - I think your opinions mirror Bob's opinions about upgrading from 5.5 to 8.0. Something as little as 2.5 gallons difference - and there you are investing 45k to get into it. When I was into car racing and stuff - this renown legend in racing circles, Smokey Yunick, always liked to remind people about the costs of running a race car - he would say "There's cheap racing and expensive racing - and damned little in between." He basically said you could do well with short money. But once you made this upgrade or that upgrade - you ran into failure, a need for a team, an engineer, a machine shop to proto type engine parts - basically you could either remain under the 'radar' and enjoy 'bucks' down racing - or had to go all the way and acquire millions.
I as well, in anticipation of a less than luckluster economy will be keeping my company to just myself and the occasional aid of another contractor. It's just me towing a trailer - so basically I have no future plans for growth past what I can do myself - as well I wouldn't let anyone drive a trailer! Funny how easy it is to make your first 100grand by yourself. Trying to get another 100grand profit requires like 4 times the effort - yep the logistics of business.