Cyclic Link,
A few ideas in case you haven’t thought of them.
Your investment should look at the long term saleability of it when it is built up, which will come with a site that you can grow as long term and with a reliable friendly staff including eventually proven independent management and admin.
Get a good long term relationship if not contractual relationship with the local govt authority for your own security to not be at risk of rule changing by busy body councillors. I.E Start by selling your business as job security for more locals and thus capital investment into their community. They may offer good terms for a piece of dirt on the airfield say, especially if it is the one you secretly have your eye on.
Initially I would say your wife or someone close needs to be able to do both the bookkeeping and A/C records standing on their ‘ead to allow you max time to ply your trade.
Building a rep to operate at night is good advice but if the UK is anything like here your Achilles’ heel will be reliable linkages with good E & I and rad techs. Without those your rep will languish. There are plenty of other specialists that you will need quick and reliable access to such as x-ray and other non destructive testing dudes. Go for the private operator in those areas too if you can as your work would always be put back in any workshop that supports company ops. Good freight connections are a priority.
Watch your hangar keepers’ liability. That can be very expensive but you must have it, know it backwards and know that it will work for you.
Sounds like you want to pick and choose your customer which is great if you can but initially you are taking all comers, well all payers anyway. So, I pose the question; how will you handle your noble safety standards when your client presents you with a machine for a 100 hourly and when you pull the magnetos apart or some other tell tale item, you find clear evidence that it has done heaps more than is signed off? Or does that not happen in your country?
Certainly the best way to retire in an easy manner is to have people working for you rather than trying to build wealth with just your own hands.
All the best anyway, your type builds country. There will be risk but that is all part of the fun.
tet