Her objection is against the dust stirred up by the window replacement we want to do due to alergies in her family. 

Stirring up this topic again -- I've been testing Mojo skip tracing for the past month or so and find that I get about 60% of my properties back with numbers.

It may be better for me to not stir up any heirs who might want to challenge, just use it as a rental forever.  

Or am I stirring to much trouble to bother with something so simple for a first investment idea?

For example, if you'll be replacing a roof and an HVAC system every 20 years for $10,000, that's an average of $500/year, or about $50/month that is very easy to ignore, as you figure you won't have to worry about it for another 20 years.Anyway, using the 50% as a general guideline, it appears most of your properties are probably costing you money after you account for debt service payments.Not trying to derail your question or stir up debate, but wanted to mention that in case you hadn't considered it in those terms.

The other street is a pretty lousy one; I wouldn't want to buy on this second street unless I planned to buy the whole block and rehab it...Some pot-stirring questions:- Does landscaping bring sufficient value to homes in Tucson?

To be a successful investor, you need several ingredients stirred into your investing approach.These include(a) a creative imagination,(b) personal and professional credibility born of integrity,(c) a sensitivity to the seller’s needs,(d) a degree of wisdom to accompany your thoughtful analysis of a given deal, and(e) a willingness to take an educated risk.These ingredients should be considered one at a time.A creative imagination.Every self-made millionaire has been able to think “out of the box.”

I went stir crazy.

Throw it all in a bowl and stir it up, and the average rent is about $500 per month.

You can find forums online of people who have used it for bed bugs.Be careful not to stir it up too much and breathe it in as it is a very fine powder (nothing particularly less safe than any other dust that you breathe in, but just wanted to throw that out there).