I am looking to get an inspection done just to verify that the plumbing is not going to be an issue. 

Spent $10k for cosmetic renovations (paint, kitchen, plumbing, minor repairs, etc.)

If this was a huge dump of a home that was built in 1890 and needed completely new mechanicals (electrical and plumbing) then I would actually consider it and exchange it for a home that is newer (modern layout, newer mechanicals)good luck

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].

Find an agent that can help you find properties that you're looking for, they should introduce you to a lender that can get you pre-approved for a loan, if you can/learn to manage the property or get introduced to property managers, always ask about different contractors that you can use for different things like electric, plumbing, HVAC, kitchen/bathroom remodels.

The issue here is in order to increase rents at reasonable rates to cashflow well you need to not just do cosmetic changes they require you to do extensive plumbing and electrical to be able to increase the rents. 

After signing up, they then reached out about requiring an electrical and plumbing inspection.

The factors you are dealing with are the construction type, age of the roof and it's hurricane protection, the age of your wiring, age of HVAC, and age of plumbing.

I'm looking to build a 2500 sq ft two level ecofriendly single-family home which incorporates natural surrounding into the design, I'm trying to figure out what my cost should be for architectural plans: elevation, floor plan, mechanical, plumbing, electrical, etc.  

That's much more relevant information if you want to assess the profitability of an investment or the lack thereof.As the saying goes, "If something looks too good to be true, it generally is".International real estate investing makes total sense but you have to educate yourself so you know what you're doing (same as if you invest in domestic real estate).