This could limit how quickly I'm able to build a portfolio of properties. 2.

I highly recommend going through The Ultimate Beginner's Guide and joining your local REIAs to hit up what you're looking for.

It was only after reading "The ultimate guide to real estate investing" that I learned about this website.  

If you don't have a RE agent, I would either google for the top realtors in your realtors and start calling them.And/or search for realtors on BP to help you.When I need a quick search online, i use findcompsnow and realquest express 

How quickly are houses selling in that area (average days on market)?

@Abdul Azeez, I think that the problem is that you are stacking the deck against yourself trying to do all of these things on your first deal:1) Purchasing the property from an online auction site / bank, which is notoriously tricky even for the experienced investor, due to their proprietary contracts and minimal due diligence period and strict deadlines.2) Working with a new contractor that you haven't used before, or seen their work before, and who may not be used to dealing with investors.3) Trying to get conventional financing on a property that has a short closing time and where the mechanical systems cannot be tested.4) Working on your first deal by yourself instead of partnering with a local investor who can guide you along, or at least a mentor who you can turn to with questions.My advice is to make it easier on yourself by considering buying a property with a standard contract and longer due diligence period, network with local investors who can provide you contractor contacts and also some guidance, and consider using private financing or hard money instead of bank financing.In my opinion, buying from the online auction sites is a more advanced strategy that you can use once you are able to ballpark construction costs yourself and/or you have a trusted contractor you've worked with before and/or you have private financing or hard money set up so you can close fast and/or you can purchase the property without interior access and hope to get lucky in terms of condition (but still buy at a price where you are comfortable doing a full rehab if necessary without losing much money) and/or you are familiar with agreement of sale contracts and closings in your state so you can assess the risks of using the bank's seller-friendly contract.You're already doing the right things by asking questions on this forum, and taking action.  

I am curious that you have a check book control SDIRA/solo 401K and you do not have a financial advisor who can expertly guide you through this territory. 

What to Look for in a Real Estate AgentWhen buying a home, you want a real estate agent who… Takes the time to understand your needs and goals, so you have a true partner in your home buying journey.Explains everything clearly and answers your questions, so you’re never in the dark.Has expertise and a track record of success in the local market.Knows how to find great properties in your price range.Will alert you to new listings, quickly, so you get the jump on those opportunities.Will advise you on the best price to offer for the home you want.Will prepare and present the offer, and skillfully negotiate such things as price, conditions, closing dates, etc. so you get the best deal.Will save you potentially thousands of dollars by ensuring you don’t overpay for the property you want.Will recommend reputable home inspectors, movers and other professionals you may need.Not every real estate agent offers all of these services.

I have been too lenient. Tenants are very messy.  They have received a city housing violation.   I told them about it in advance (it's also left at premises by code enforcer).  They did not correct in time so I got th...

I wouldn't settle on the front-end if you're investing from overseas... too many variables that will turn this one sour for you quickly.