So why should anyone trust any company to host their equipment, bitcoin miner or no? There are reputable hosting companies, you just do your due diligence, like any other business.
You yourself have said your plan to build a datacenter is to rent the space out to other people and "also use it for housing miners" with your attitude you would have no customers because you are an unknown entity and might be viewed as one of those "shitty crooked people out there..." I doubt you are, but you can see my point.
I've been mining with my gear with various hosting companies for over 5 years, once it became unprofitable to mine at home, and without experiencing these shitty crooked people you speak of. Oh I know they are out there you just gotta steer clear of them.
Similarly you have to have to steer clear of shitty crooked people who will rip you off when buying and selling equipment, you don't want a repeat of the "fiasco with one buyer that cost me over 10k" so I can understand you being a bit gun shy of trusting anyone.
You live and learn with this stuff, like anything. But you shouldn't cut off your nose to spite your face, it could be that its more profitable to use a hosting company than try and build or run one yourself.
you missed the point entirely... I have trusted and lost - and trusted and won. But as long as I can host at my location my own equipment I will - other than that I will buy BTC direct. As for the data center, yes that is my dream to do - but it would not be based on the sole idea of hosting miners - the miners I have on site would all be mine. The rest of the building would be used to operate as an actual data center for companies I already work with and have developed relationships with already. This has been a goal of mine even before I thought to also use it to house ASIC's/gpu mining rigs.
I am glad you have had good experiences and never encountered any bad deals. But spend some time on the forums or even off of them and you will find a lot of cases where people have been ripped off. I, for one, will keep my equipment on site or just buy BTC. I do not nor did I down or criticize/belittle anyone who would do otherwise.
Nor have I cut off my nose to spite my own face - there is no hosting company that would pay me a profit over what I already make.