Cheap Adventure Handbook
Please look through these convenient tables showing cheap crafts and deposits under 100k per attack/mattack as well as some additional recommendations leading up to 250k.
Note that these lists only contain Cards to be deposited, and Headwear to either be crafted or bought. I've included the stats given on craft/deposit. Prices for headwear are always the cost to craft the item using raw materials. If the headwear gives the bonus on deposit then see if there are any up on the exchange that you can just buy as this may be cheaper due to fluctuation of blueprint costs.
This list does not include furniture. I will include it in a future update but having to look these prices up manually is the worst. I would love to design a more automated solution.