I am passionate about owning/controlling my income sources (which I have done in the past though not in the present), and I have some long-term "mission" goals that are very important to me that would be well-served by some real estate experience at a higher level than single-family.

(This is what scared me a lot) So in terms of BRRRing here you will need to find burnt down buildings to be able to make it work to bypass the rent control requirements.

And only 1 I can find that is WiFi that you can control from an app.https://www.amazon.com/Mysa-Thermostat-Electric-Baseboard-He...The Mysa. https://getmysa.com/It will probably do what you need for the time being.

Scope of Work:Initial Assessment: Our team conducts a thorough assessment of the property to evaluate its current condition, identify structural issues, and determine the scope of renovation required.Design Concept: Collaborating with architects and designers, we develop a design concept that blends contemporary elements with the historic character of the row house, maximizing space utilization and optimizing layout efficiency.Structural Repairs: Structural repairs and reinforcements are undertaken to ensure the integrity and stability of the building, addressing any foundation issues, roof leaks, or structural deficiencies.Interior Renovation: The interior of the row house is completely renovated, including the removal of non-load-bearing walls to create open-concept living spaces, installation of new flooring, upgrading electrical and plumbing systems, and installing energy-efficient fixtures and appliances.Kitchen and Bath Remodeling: The kitchen and bathrooms are transformed with modern finishes, custom cabinetry, quartz countertops, and high-end appliances, creating functional and stylish spaces for daily living and entertaining.Historic Preservation: Special care is taken to preserve and restore original architectural features such as exposed brick walls, decorative moldings, and hardwood floors, enhancing the property's historic charm and character.Exterior Enhancements: The exterior of the row house receives a facelift with fresh paint, repaired masonry, restored windows, and landscaping improvements, enhancing curb appeal and contributing to the overall aesthetic appeal of the neighborhood.Quality Assurance: Throughout the renovation process, our team adheres to strict quality control measures and standards, ensuring that workmanship meets or exceeds industry best practices and building codes.Finishing Touches: The finishing touches, including interior decor, lighting fixtures, and hardware, are carefully selected to complement the design aesthetic and create a cohesive and inviting atmosphere.Timeline and Budget:The single-family flip project in the Philadelphia row house is estimated to be completed within [timeline], with a budget of [budget].

I'm addition to what's already been  said remember you have no control over the HOA regime fees.

But, this has absolutely nothing to do with living out of a line of credit rather than a checking account.Even not counting the opportunity cost credit given in the analysis for the “reserve” theoretical investment, the additional nickel and dime fees associated with the HELOC will eat up any savings.Perhaps you became much more vigilant at controlling expenses when you decided to use the HELOC to pay your everyday bills.

Also, the erection of CLT buildings should be done by specialized contractors who have experience with the product.Another area that is seeing new technology applied is in the waterproofing / vapor control products.

Additionally there are plans that give you checkbook control and plans where you need to go through the custodian for all transactions.   

@Byron Paille cash flow equals control.

You are correct, I bought them in CA, by choice to have greater local control.