I am losing on offers that are often inspection waived.

You also will not be able to see the house and no one should buy sight unseen without a history of doing it.If you are talking about Auction dot com or Xome or Hubzu, those come with a buyer's premium on top of the sale price between 5-10% and often have ghost bidders in the system so you will see it keep getting reset to hit a higher bottom.As a new(er) investor, auctions are where you go to lose money and take on excessive risk.

They help you make decisions that lead to significant long-term tax savings, which often outweigh the cost of their services.

Wood windows with this problem can often be fixed with a $5 part that keeps them open when raised into the open position.

To add to what @Jonathan Greene wrote:1) Understanding the local market, so you know what Neighborhood Class your building is located in, what Class your Building is (condition & amenities), and what corresponding class of tenants will be attracted.2) Using all this data to properly set your expectations and a realistic ROI.3) How to better screen prospective tenants, including catching fraud, so your property performs better.

Typically HELOC lenders don't escrow since they're often set up to be in 2nd and rely on the first to check tax/ins more regularly.

This can be good if you plan to refinance or sell before the balloon is due.Low down payment: Seller financing often allows for more flexibility with down payments.

Starting forecasts and ending numbers often times to not match exactly and sometimes at all.

When adding a single ADU, the cost of adding the ADU hands off is typically greater than the value added if in single family zoned areas.Here is a list of why a hands off ADU addition costs s often one of the worse investments.  

These loans often have more flexible terms than hard money loans.Cons: You need a strong relationship with investors, and interest rates can vary widely depending on the deal structure.