The lifespan of each item is important because short lifespans let us do bonus appreciation.

On the SFH do you plan on using it as a STR in the summer only or year round? 

You could either refinance your loan at that time to a Conventional loan to restore your VA entitlement for another property wherever you move to next, or without refinancing you will still have bonus entitlement to buy another property. 

Most likely targeting Round Rock and Hutto/Taylor area.

@Vik J. this article was focused on this specific region within Williamson County, they also did an article pieces on the North East side highlighting Round Rock, another for Georgetown, and also for Cedar Park.  

You have to set a consistent mailing schedule for your list(s) and make sure you meet that schedule.Most investors are not consistent and give up after one round of failed mailers.

Pair yourself up with doers to round out your team.

All other residential buildings that are 20 years or older would be able to add 33 percent of the number of existing units, and rounding up or down.2-flats: 2x0.33 = 0.66 rounding up to 1 unit3-flats: 3x0.33 = 0.99 rounding up to 1 unit4-flats: 4x0.33 = 1.32 rounding down to 1 unit5-flats: 5x0.33 = 1.65 rounding up to 2 units6-flats: 6x0.33 = 1.98 rounding up to 2 unitsAnd so on.If adding a coach houseAll properties that are either vacant or have a single-family house, 2-flat, 3-flat, or 4-flat would be able to add one coach house as long as there is no conversion unit on the lot."

The 3-4 family would then become a rental that we would ultimately hold long term.The other 2 units we would clean up and do minimal work to initially and when the first round of tenants leave, renovate/upgrade the other units as they become vacant to hopefully increase the rents.I had been researching single family options prior to COVID and am starting my research on multifamily and hoping you guys can point me in the right direction to save some time on a couple of things.

At the time, same duplexes in Round Rock were selling for about 30k cheaper with about same rents.