What financing strategy would be most effective?

Every little thing in the project should be in writing, even down to the door stops :-) See my tile spec sheet below ...Two problems with your post though - 1) In my experience, most problems come from the customer changing their minds constantly.

I just reveled at a companys lead strategy that lead from the website directly to whatsapp.

Were there any challenges with shipping, customs, or delivery?

All interest rates and payment plans are custom made to work for both parties therefor creating a win win scenario.As far as partnering with the banks goes.

Quote from @Brandon Weis: In your opinion, as you are starting out at 0 reviews, do you think it is a must to beat the competition on price to overcome customer's hesitancy or lack of trust with no reviews?

If you’re passionate about windows and doors, you should naturally have plenty to share based on your expertise and the questions your customers ask.The main purpose of your blog should be to educate and provide value to potential customers.

Yes we avoid custom work to help keep cost down. 

Here’s the big question: Is property management all about profit, or should it be more of a customer-focused experience?

Anything above that is billed to the customer separately by you.