I have a work mobile and a "private" i.e. family and close friends only who have the number, I don't even take the "work" mobile in the house, let alone on holiday with me
Just stick an answerphone message on it "Currently away for xxxxxxxxx back on xxxxxxxxxx
I found that the real cheapies just cost me as much as I could sell them for by the time I'd bought parts, 12 month MOT labour etc
My Sales model is this ..................... Buy something 2008 upwards, with clean bodywork, (I hate paintwork), but I buy "spares / repairs" stuff privately, normally Cars with electronic problems, and fit second hand modules etc, code stuff where necessary, fresh MOT and Valet, unusual if I don't earn at least a bag out of every one
I fix them up when Workshop is quiet, so effectively I'm buying some work, first started that when I had the Transmission Firm, used to buy Cars from customers with a goosed auto box, who couldn't afford or didn't want to spend out to repair them