@Marc Shin, I echo Gino's thoughts.First the financial: assessing any improvements will come down to how those improvements affect both your cashflow and your overall value of the asset.  

I have successfully flipped about 2 dozen properties over the past 7 years so I was in the business before signing up for the $40K Flips program.  

A dozen properties takes less than an hour per month. 

(a) Anyone entitled and desiring to redeem real estate under the provisions of this article must also pay or tender to the purchaser or his or her transferee the purchase price paid at the sale, with interest at the rate allowed to be charged on money judgments as set forth in Section 8-8-10 (as it is now or hereinafter may be amended), and all other lawful charges, also with interest as aforesaid; lawful charges are the following:(1) Permanent improvements as prescribed herein.(2) Taxes paid or assessed.(3) All insurance premiums paid or owed by the purchaser.(4) Any other valid lien or encumbrance paid or owned by such purchaser or his or her transferee or if the redeeming party is a judgment creditor or junior mortgagee or any transferee thereof, then all recorded judgments, recorded mortgages and recorded liens having a higher priority in existence at the time of sale which are revived under Section 6-5-248(c).If the redemption is made from a person who at the time of redemption owned the debt for which the property was sold, the redemptioner must also pay any balance due on the debt, with interest as aforesaid thereon to date.(5) Mortgagees of the purchaser, or their transferees, are considered transferees of the purchaser, and a party redeeming must pay all mortgages made by the purchaser or his or her transferee on the land to the extent of the purchase price.If the purchaser's mortgages do not exceed the amount of the purchase price, the balance must be paid to the purchaser.

Personally, I don't like condos- HOAs and surprise special assessments can eat up any potential profits and in most states, they can just change the rules when they want to and decide that LTRs or STRs are no longer allowed. 

Buyers for off market are dime a dozen..

My houston properties are getting re-assessed for new HOIs, I am looking at Hawaii and finding it hard.

There are dozens of good books out there that will give you a basic overview but based on your description of skills/assets you will probably learn little more than you already know from your own experience. 

WIP Inventory > Tile  $500But let’s say I’ve spent $30k on this rehab and I have two dozen different accounts in WIP (tile, carpet, drywall, etc.)

Here are some diagrams to help you on this quest: Asset Protection Decision Diagram - to help assess the need for asset protection, and what to implement: AssPro_Decision_Diagram Asset Protection Onion Diagram - what, when, and at what cost one should implement in terms of asset protection - APOnion__Diagram How a fully implemented asset protection layout might look. - Asset Protection Layout A CSS Decision Diagram flowchart intended to bring together all the various questions when assessing the benefits of a Cost Segregation Study (via a professional or DIY).Let me know if you have questions or want to chat further - I can give you my investor perspective - text me at 512-368-9940 and we can talk further.PS.