You can find banks to work with, however you need to explain them your personal situation upfront: my personal experience is that loan officer have pre-approved me and then denied me later one once the house was under contract.

If the seller has the ability, even if not the desire, to make his monthly payments, without some impending imminent reason for default, the short sale would be denied.

The seller's agent said if I go FHA, the home has to be inspected by a specific inspector sent by FHA, and in that case, the first buyer was denied the home because it didn't pass the specific "FHA inspector" guidelines for a "203K rehab loan".  

Many years ago, when I lived on Rue St-Denis in Montréal the units along the street face of our building were less in rent (5-10%) than those on the courtyard in the back.  

Wasn't easy since I was using a bank that didn't seem to have much experience and after 2.5 months of waiting they deny me the loan.

If you try to partner on residential your debts will still be counted even though your income won't be which could throw off the total debt to income of you and your credit partner, leading your residential loan to be denied.

Lying is 1 of the reasons why insurance could deny your claim - if something happens. 

I am not denying this fact, however I do see some parts of wholesaling that can be easier/more beneficial.

Then the extension was denied next day, the day of closing (today).

I applied to a few banks and each told me 30k was to small for a conventional loan. This is my first investment property. Can any of you guys give me some tips how to make this work?