geoarbitrage, my friend. Work for clients in high cost-of-living countries. Spend your time in lower cost-of-living countries. Instant lifestyle upgrade. Aren't you a little old to still be using PHP? ;)
Re: PHP - I have front-end experience including some of the emergent technologies such as Node.js etc.
Out of interest, what skills / technologies would make me more marketable to employers (overseas or otherwise)?