Looking for a lawyer and accountant that knows Canadian rules

Hello everyone. I'm looking for a good lawyer and a good accountant that understand and currently take care of Canadian's who are investing in the USA. I am currently working with two others that very much so understand Canadian and US a taxes and ensure that I do not get double taxed etc. I found them through another connection but I find they respond very slowly. I'm looking for a true professional that I can rely on that is not trying to take advantage and would like to build a relationship. I also have used my current lawyer to set up my corporations and LLCs as needed. Right now I would like to change my corporation's address from my Canadian address to a USA address so that I can build USA credit with no attachment to Canada at all. Bigger pockets has been very helpful for me in the past and I thought I would reach out here as I know many skilled individuals hang out here. Thanks Nathanael