I am sometimes of the mindset of go big or go home, in a smart way, aka - do your homework. (We put 650k into our first investment property but did our research first.) Obviously there is due diligence in the area to see if your business idea would be viable in the area you select not to mention this type of business being allowable on the property. When it comes to land, you can definitely find 10 acres for "fairly cheap" (I know that is a relative term) and some with cabins on it already. What would it take to start it up, what are you out ($$) if it fails, what can you sell it for (the land and\or cabin), etc. Go to other shooting ranges, start small talk - talk to those that have done it.
Just because something has not been done or isn't currently being done doesn't mean it cannot be done, I say get into your research and see if it makes sense and if it does, go for it!!!! Everyone has an opinion and most people thought we were crazy with our first investment, so far we are on the right track.
Good Luck!
