The best way to scale while continuing to work full-time is to outsource every aspect of the flipping business.

@Fred CannonIf you self-manage your own properties, you likely do things and pay for things that people who outsource the management don't do.These items are possibly traveling to your investment property to make repairs, collect rent, etc.You may also pay for tools to fix up small items.There may also be property management software that you may choose to have if you don't use a property management company.These are a list of expenses you may be able to deduct if you decide to self-manage.

While I can do it myself, I am ready to outsource. 

See if you can connect to to a firm that offers that service.If your portfolio is large enough, then it might make sense to outsource all of it to a firm that will take care of everything on the back end and then send you monthly or quarterly financial statements.

marketing for leads to deals, or outsourcing overseas for calling is doable and systematic....but for deeper follow-up, and getting a contract, physical seeing property, dealing reality, how do you outsource, partner or hire for that?  

If you can minimize that, the numbers might work better.If you truly want to DIY the whole thing, check out sources like Fine Homebuilding for the best way to get the best results.

I think most of those who prefer desktop are handling their books in-house while online users outsource their bookkeeping. 

Overall, it's similar to a turn-key process however you don't have the mark-up of outsourcing all of the work. 

For things like outsourcing upsells where you're just the middle man (e.g. providing an option to purchase tickets to a local tour or theme park) I doubt that would change the taxable structure, but definitely a conversation to have with a CPA.  

They're spotty at best.It will be extremely hard for a non-practitioner to Google around, attempt to self-educate without an accounting background (really assuming here because I don't know yours), and then end up with a functional understanding of the tangible property regs.Sometimes the greatest leaps in life come when we realize our limitations and outsource to individuals who specialize in a field different than ours...I do not attempt to write operating agreements...