Cheep hides and substrate

toilet roll tubes, flower pots, margarine pots. to make them look more decrative you could glue stones on them.

for substrate you could use garden leaves and freeze them before you use them to kill parasites and germs.

newspaper

kitchen roll

I use fake leaves for my slings and a toilet roll tube for my trap door and since it converted it not seen it since.

I use upturned dogs beds as hides for my bigger two, quite cheap and not too bad to look at.