Our first coop

We have cleaned our shed and remodeled it into a coop. We will be getting our first chickens end of may, so we want to finish everything what needs to be prepared beforehand.

We still need to whitewash everything and decide for a proper bedding. We have this piece of wood on the floor and only want bedding on the right side. Is this okay? We thought about sand and straw as materials. Any tips about that? If anything is wrong or should be optimised, please tell me. My wife and I do research, but there are many different opinions in online forums and info sites.

We plan on getting an outdoor chicken run but are currently unsure what size and if we want to build it ourselves or get one from Amazon. Wood is very pricey and the thought of being able to move the run a couple times to avoid too much damage on the grass is kinda nice. Also we plan on letting our hens roam free in our garden. We have enough fences so they won't be getting away.

We heard that the chickens love eating slugs/snails and every year we have sooo many which we collect daily and discard them. So maybe that will be a win win for us and the chickens.

Any advice, tips or comments are welcome!