回复：请人装修报价是怎样才能做到心里有谱？我学过一些建筑和室内设计但不熟悉美国材料价格和预算n

Since you know architecture and interior design, I would suggest that you prepare your drawings and specs first then use them to prepare itemized bid items (by rooms/area, functions, system, whichever is better for you to make decision) for proposal/quotation.

You can try www.bbb.org to look for credited local contractors.