They are all solvable, just be prepared to be flexible and leave some buffers for yourself (money, time, mental energy etc.)  

But, because of the many repairs that I had to make in the beginning I occur a big chunk of debt on my credit report.Can I invest in more properties now, or do I need to improve the health of my credit report?

Appreciation is a mental thing.

So we do year leases to get people mentally in the mode of planning for a move when we prefer they move.

Not to say that you would do this, but from a renters mentality, no pictures=skip. 2.

But I keep getting stock on the whole mentality that I need to have a business name, business cards, and website first.  

For every headline that is "I worked hard to rehab my apartment and charge more rent, increasing value to my tenants and to myself" there are 2 that say "I made $25k in 3 weeks" the sub-header should say something like "by tricking a mentally challenged grandma on public assistance into selling her perfect house at 50% off market value even though it just needed paint", or "by giving a crackhead mobile home owner 25% of existing equity so they could feed their next fix, leaving them homeless".  10% or even 20% off market, net of repairs is one thing, but beyond that I feel I'm taking advantage of a personal situation vs reaching a good deal.  

As it's not a means test program (everyone gets it) it operates much like your private health insurance does, basing its premiums on how much it pays out.

The appraisal came back higher than the purchase price but was apparently "conditional" on several health and safety items being repaired.  

I doubt they have been getting any offers near the listing price, but you have no idea the seller's mental state.