My biggest struggle right now is I have an amazing business partner who finds awesome deals almost weekly.

My biggest problem with that is that from a great deal category I'm getting into average deal category by raising my final numbers.

Lenders will want to see all sources of income and all debts for the last two years.

The biggest issue is finding a deal that is REALLY a good deal and not one that is ALMOST a good deal.

I think a large part depends on how you plan to source the rentals for your cottages. 

The biggest variation from house to house and from investor to investor is how you want to account for future maintenance and capital expenses.

And if you are a newer  investor, syndications allow you to hire a manager that has infinitely more experience and knowledge than you can ever hope to gain (and thus avoid newbie mistakes).The biggest disadvantage with syndications is that you have to be able to feel comfortable with vetting and choosing a manager that will have full control.

This is not the first time I've listened to a guy named "Ari" tell me he could sell me a foolproof system for making me money, and every other time in that far-off land where "Ari" is a very common name it was not 2 Legit 2 Quit, no, no, no, filoi kai aderfia, not by a long shot.In any case, the biggest problem, the bottleneck that keeps us from scaling up our ghetto BRRRRing quickly, isn't the cost of borrowed money to keep up with deal flow, it's the lack of affordable competent renovation tradesmen to plan, manage, and carry out the renovating.

You're biggest choice is going to be area, and Townhouse or Single family. 

I am very interested in investing in REITs or in online crowd-funding projects to have as a good source of cash-flows, yet I cant seem to find an online broker or crowd-funding website that allows international citizens and international banks.