I have a straightforward approach but one that begins "Research and do the Homework"
After that 'due diligence' for sure make a booking if satisfactory.
Then 'treat her well and with respect'. At this point it's surely about not pissing your investment down the drain? If it is, do a negative report. but generally, in my experience if the investment warrants it, it will warrant it it again.
I'm really not a white knight and have blanked women who have fucked me about and said so. Fortunately my research has been robust enough to avoid disasters although there was one very early on and which not I only regret but speak from experience.