Social media and online marketing - we signed up with our web developer for a service she began offering early last year where you pay a monthly fee for continuous SEO, including updates on social media, etc.  

I looked into SDIRA but prefer to do a Roth conversion (pay taxes) and then invest in RE within the Roth. 

Ok, I'll bite.....give an example of a home that is affordable, sustainable and desired by many.Remember it is critical that you as the business owner (and your partners/investors) make a good profit after paying overhead and operating expenses.

Because of things like this, I now tell them upfront what the job will pay.  

Airbnb tenants also pay a higher price. 

I'm willing to even pay for a subscription but AirDNA is pretty pricey. 

Most retail tenants will happily pay more in rent if they can get more sales.  

If we don't invest it and take advantage of bonus depreciation or 179 deduction/depreciation, then we'd be paying significantly more in tax after the income passes through as schedule K income and we would not be getting the maximum amount of benefit that we could with a sum of money like this. 

Because this is your first rental property, I would recommend finding an amazing PM company and paying them what they are worth.

is it better to pay down more on the above SFR and bring down the DTI ratio and then leverage the SFR and use that amount to buy another townhome?