I think you should have a security guard for sure; I advertise as having my husband with me (6ft 3", 16.5 stone) and only do this part time, but I frequently have "dates", and often turn bookings away if something doesn't appeal.
I realise that more guys want a lone female, but my profile highlights the advantages of another man being there, i.e. the option of a spit roast/photographer etc.
I am obviously safe as a result, but even I have had/got bruises, some nasty black ones as we speak on my left breast!!!!....these guys can be so heavy handed, I can't imagine what they would be like if I was on my own. Take care ladies. XX