Hey Dave,
I'm seeing two immediate issues that once solved will help ...
You need to define your target market. Solo-preneurs are one thing - but I think you need to niche further. As Renee pointed out, there are solopreneurs who have an awesome grasp of technology and don't need your help. So, solopreneurs who don't have a strong grasp of technology and aren't sure what they need in terms of web-hosting. Okay, that's a bit better.
You can position yourself as the no-nonsense IT guy who talks to solopreneurs in ENGLISH rather than IT. What's web-hosting? Why do I need it? WTF is bandwith?!?!?! Do I have enough of it or do I need more?!?!?!
By answering these questions for people, you'll sell more hosting.
The paid membership is interesting - but what would be EVEN more interesting is if the hosting came WITH a monthly membership program that took you through the basics of IT for micro businesses - I'd use a continuity model with a weekly email and maybe build in a small amount of support? A couple of hours a month? Ohhh - and maybe a recorded interview with an expert. Everyone has a vested interest in selling their stuff, so don't worry about that - but you could have, like, an e-commerce expert, an adwords expert, an
SEO expert, etc - explaining their areas in basic language (you would need to keep them on track as far as this went, because experts are notorious for talking as though everyone understands what they are saying!). Allow them to make a special offer at the end of their interview and switched on types will see the value in sharing their time and expertise for free.
Add the costs for these into the basic hosting package, because you don't want to run the whole thing at a loss ...
So now you've got a hosting package which is priced competitively (not the cheapest in the market, but competitive) - and isn't really just about hosting. It's about helping them to get their heads around the whole crazy world of the internet ... hosting with support ... we don't just send you out into the wild, we teach you how to defend yourself, etc.
Lol! I've excited myself with this idea ... I've got clients (in non-competing industries!) who could do something similar ... ohhhh!
If you want to discuss further, feel free to flick me a PM or an email ... I work with businesses on creating, marketing and selling information products, so this is my area of expertise ...