Hi, im building a deck for my neighbour. When i built our deck i did it the proper way and honestly it could survive an earthquake but my neighbour doesnt have a lot of money to spend and she said she's fine spending less money and only having it last a few years rather than spending more and having it last longer. The decking is being build over a current patio. I'm removing the slabs on top to expose the dirt underneath on the raised patio and then i was going to put down landscaping fabric and chips for drainage. I was going to use the brick wall of the patio for support of one of the beams. My original plan was to use galvanised post bases to raise it off of the wall for drainage but to save money and because its pressure treated i was thinking about scrapping that idea and just having it straight on the wall. My neighbour then wants the decking longer and past the old patio wall so i was going to do deep concrete footing and post bases but to save money im now trying to find out the minimum dimensions i could do the concrete footings to save money, any advice? Lastly the rest of the decking will just sit on top of the chips, not ideal and ive told her that but if shes able to get a few years without it being bouncy that will do. I could use the slabs on the right side to support it maybe rather than just chips? Don't want to attach decking to breeze block wall or outhouse wall because they're really old and crumbling themselves without having decking attached, if i attach decking it will probably pull the whole thing down. Any advice will be appreciated! Thanks!