They are also self employed but showed low income (technically does not meet our monthly income requirements). 

Now with the 70k you can either pay off the first rental again, pay off the additional amount you put on your primary residence or use that money to scale and buy more.

I’m a newbie so please forgive me but the Opex at 24% of the Gross rental income seems low.

I found this one surfing around https://jerrybarker.com/calcul... but we usually just average the income out then use https://propertytracker.com which isn't designed for STRs but works fine after averaging the projected income outside of the app.  

They undergo regular training and stay updated with industry trends, laws, and best practices, ensuring high-quality service.Access to ResourcesNARPM provides its members with educational programs, legal updates, and networking opportunities, enabling property managers to handle any situation effectively and offer informed advice.Efficient Tenant ManagementNARPM property managers excel in tenant relations, from screening and lease agreements to conflict resolution and evictions, ensuring stable rental income and minimized vacancies.Legal ComplianceNARPM property managers are knowledgeable about landlord-tenant laws and regulations, ensuring compliance and protecting you from legal issues.Maintenance and RepairsNARPM managers have reliable contractor relationships, ensuring timely and cost-effective maintenance and repairs, along with regular property inspections.Time and Stress ManagementBy hiring a NARPM member, you delegate daily management tasks to a professional, saving time and reducing stress.Financial ManagementNARPM property managers handle rent collection, accounting, and financial reporting, providing detailed and accurate financial statements for informed decision-making.Marketing and Leasing ExpertiseNARPM managers use proven marketing techniques and platforms to attract and retain tenants, ensuring quick rentals at optimal rates.ConclusionChoosing a property manager is crucial for any landlord.

The home is 1,841 square feet and was constructed in 2009.The use of the accelerated depreciation strategy helps real estate investors to reduce the tax liability immediately which therefore increases their bottom line due to the offsetting of income.

I'm curious to hear from this community about what additional services you think a property manager should offer to enhance the overall property management experience.What are some other innovative or valuable services you think property managers could offer?

It's a business so the rents will be the main income and subtract expenses including savings.  

If your goal is to acquire additional investment properties in the future, you are better off starting out with a traditional rental, whether single family or multi-unit, compared to a vacation rental or Airbnb, where the income potential might be higher but won't be used to help you qualify to purchase other properties in the future.

I echo what @Jon K. said... if you're still interested after doing some additional due diligence, try starting with 1-3 as opposed to jumping into 10.