BAck in 06 and 07 I had and I kid you not well over 150k in revolving credit at my disposal.I actually took advantage and used a convenience check for 50k to fund a DP on a 2 fam. about 8 months ago.....You just have to be careful about being late as mentioned above.

Revolving door bond ratings agencies4.

I agree with Chung Cam for your first few purchases, the benefits of using a conventional mortgage (personal) generally outweigh benefits you’ll get with an LLC. 30 years at 4.something percent is still a great deal!

Finally a HELOC will most likely show on your credit as a revolving debt so it will be classified in the same category as a credit card.

I referred to it as a revolving foreclosure market in 2006 when I was appraising.

While you may only be saving $10/day, I think it's good business and good practice to keep revolving debt as low as possible when you have the cash to do so.  

The success for his second and third options both revolve around you being honest with the lender and they are aware that the first deal is in the works.If you are up front with that information, you can find a work around such as what Chris listed.

I was wondering if anyone had any recommendations for the best software to help with accounting, tracking rent payments and CAM costs?

If you blow out a cam on the IKEA box, you are screwed.

The credit line is also revolving so once you pay the funds back the full amount of the credit line is accessible, which IMO is a HUGE positive for using those funds for rehab costs or down payments.