Yes that's my plan actually. I'd rather like a family Mausoleum were everyone I love is on our own property, I think it'd be lovely and I think it would help the grieving process to be able to pop down the garden for a chat.
I've dug a lot of graves in my time but never on private land. It would certainly knock value off the land if you wanted to sell it at a later date, and you can't just dig them up and move them. I have dug a few up as well.
OHs ashes are scattered beside the gate entrance, to ward off trespassers. I wouldnt dig 6foot down for a burial without checking for gas/electric or sewer fittings.