We evaluated all available Mac accounting packages - open source and commercial - available at the time and Moneyworks had the best implementation of the features we required (multi-company, multi-currency, multi-jurisdiction (taxation), project budgets, etc).

@Sandra HaleMany investors are unnecessarily afraid of UDFI taxation.  

Knowing your money will need to pay tax at least 1 time, which category of tax would you like your money in?  

As such, yes, you would be able to maximize any profit sharing contributions to your own Solo 401k plan, which would be 20% of net business income to your LLC if you use pass-through taxation.

An LLC is considered a flow through entity, so there is no additional tax at the entity level and all income flows directly to you, as if the entity is not even there.

An LLC may not be the best route, especially if it is not recognized in New Zealand as a flow through entity with respect to taxation.  

Feel free to add them here or PM me the questions.Here is a link to a post I made on LLCs: https://www.biggerpockets.com/forums/12/topics/76052-simple-taxation-questions

Suggestion: find at least one (1) investor who started by buying out-of-state properties and is still financial satisfied with that game plan.Sure, it might be ok for someone who already understand real estate, title, financing, taxation and rental management then ventures to another area where they need to build a base of contractors, handymen and other vendors. 

I think your best bet is a state directory from a state agency (department of revenue or taxation) or state-level assessor association.

I can give myself a functioning salary without the temptation of bleeding the account dry because of the double taxation.