You are probably looking to purchase a pop up, but I have been hunting with my 10 year old son sitting in natural blinds.
Some are brush piles from lanes that we have cleared through the brush and some are just logs and branches piled up by a tree or bush.
On Friday, we sat in a briar patch under a dead jack pine. The briars were tall enough that just our heads poked out. We had 3 does come in and offer 2 shots... (missed both). I had to stand to shoot, but it worked out real well.
I carry a pair of pruners with me and used them to clear a sitting area. I even use them if I am still hunting and have to pass through a thick area, instead of breaking branches to get through.
Anyway, that has been working for us this year... and it is free.
Good Luck