Geotech drilling/investigation for residential developments

I’ve been tossing around the idea of starting my own smaller drilling/site investigation operation eventually (27 so this would be a ways down the road).

I’m wondering how reliable of a market inspection of properties and developments would be. The pitfall I see with properties is that you wouldn’t have returning clients just one shot projects but maybe word of mouth to communities could work. Alternatively developments present the possibility of returning clients if it’s for some kind of another business. Anyone do this sort of work? I’d love to know more.

I also have a fair bit of experience in geophysics and magnetics in particular. How easy is it find clients who need utility location done?