Allnew - I understand completely. DHs family all in NZ. My bro and nephew 60 miles away and sis 120 miles away - and Mum in a home with dementia. My sis and I only became friendly again about 4 months ago, so prior to that no family to babysit here either.
Actually lovely Essie was the first person to look after Ryder other than DH or I, I think, on Xmas eve.
A friend who have a baby 6ms younger did offer to babysit for us once and DH and I went for a meal. However, whilst they have the best intentions, they really are clueless about babies and have enough trouble looking after one. I think they found having the two babies too hard. Well, put it this way, they have never offered again.... But that one night showed DH and I how much we needed the time together, we were like dizzy teenagers again.
So yes, I know exactly where you're coming from. Now my sister comes and stays about once a month which is wonderful. We've also bitten the bullet and joined up to a professional sitting service attached to a local nursery. It is reassuringly (and eye wateringly) expensive. I really do recommend it, IMO I don't see that a well referenced and CRB'd checked sitter is any different to a childminder.
However I would strongly recommend asking your PILs, perhaps at their house, just so you know where you stand with them. That was if there was ever an emergency you would know you could/n't rely on them.
Sorry. Long winded reply I know. A strong part of the NZ move is to be around family we can rely on to give DH and us time together.