There is a case for buying well-located solid assets that produce immediate current cash flow at reasonable leverage. 

I am buying a flip house from a wholesaler.

This vary heavily town to town. 20% down is great if buying strictly as investment but if you have a way of owner occupying I would explore that route and apply the 20% down to increasing value of property and instead using low money down loan. 

The 5-10 it gets heavier and a lot busier, and 10-15-20 it really is untenable to self-manage especially if this is not you main business like a person buying their own rentals and building it like a small business. 

My ultimate goal would be to buy fixer-uppers to turn into long-term rentals.

While I am normally in the do-not-sell camp, in this case it might just sell and buy at the new location.

The first is that there's no consensus between tax professionals, and the second is that you will not like my personal interpretation.My interpretation is:Until the property is "placed in service" - everything goes into basis.Illustration.You buy a property July 1st.You finish rehab November 1st and put the property on the market.Your tenant moves in January 15th.The property was placed in service November 1st, and it does not matter that the tenant did not move in until the next year.Everything paid between July 1st and November 1st, including interest and utilities, goes into basis.

MattIRA buys a property for 100k and puts 30k to 40k into the property.

So, make sure YOU understand the copy & paste info below:Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

I would not buy something right now just to buy something.