Suggestions for entry level projector home cinema system

[Mario149]

I appreciate this has probably been done to death on here, but search is not throwing up anything obvious

We're lucky enough to have a large snug type room in our house, and currently the largest TV we can fit onto the built in shelves/cabinets or on a suitable wall etc is a 40". Problem is we're sat about 4m from it whatever, so it's still small relatively. We're thinking that a projector with screen and sound system may be a good shout, esp since it is a naturally dark room and we only really use it at night anyway. Plus as our kids get older it will be fun for them.

Can anyone suggest a decent entry level setup? From my limited understanding we'd need:

- a projector we can bolt onto a wall behind our sofa
- a roll screen we mount on the wall/ceiling on the opposite wall and pull down
- a home cinema sounds system
- some sort of receiver that can we can hook up to freeview, dvd player, stick a chromecast in, get netflix on etc that will drive the projector and sound system
- ideally all that should be wireless (or at least the sound part) but it's not a deal breaker if it isn't.

Now, bearing in mind that we only just transitioned to HD tv about 2 years ago, we're pretty easy to please. So we just need a setup that is decent and works, doesn't have to be fancy i.e. I'm looking for the Ford Focus Zetec setup, not the the BMW M140i setup!

Suggestions/info/links would be great if you have knowledge in this area!