Flying a DR 1050 on UK LAA Permit to Fly, the Group has 6 members each paying £50 per month for hangarage, insurance, and payment to LAA for Permit. We pay £60 per hour wet, but landings are extra. We're making a good hourly profit towards engine fund and fabric replacement. We do most ( often all) of our Permit work. The Inspector examines the aircraft about a month before the permit expires, and tells us what is required. He then returns and does the Permit Inspection. We do the airtest, and send off the documents to the LAA. Within days, we have the new permit. Total cost in the last 2 years was low hundreds.
We are give tasks to be done over the year, and get them done for the next year's Inspection. We have very little unexpected downtime.
Before going on Permit, we had months of downtime, several thousand pound bills, and were struggling to build an engine fund.