Thinking about installing AC system

[SnowYaris]

I'm looking to take on an ambitious project to install air conditioning in my 2011 Yaris. I regret buying it without AC and now I'm looking to add it. I have searched high and low but it seems that my best resource for all of what I need is from the dealership. I can pick up all the components and electronics required to add this in for roughly $1,140. My background is mechanical and electrical engineering so I have a strong understanding of a refrigeration system and electronics. Has anyone here done this before and have tips to offer? My biggest challenge will probably be installing the evaporator core because its tucked deep in the dash. I like challenges but the dealership will install and warranty everything for an additional $500. I'm reaching out, any advice?