Rah, Daniel.
That's great that you both are ready to embark on this journey. Some things to consider:
1. Yes, as long as she has enough entitlements remaining, she can use her VA loan while you move to your new primary residence and keep your VA loan at the former, now rental, property.
2. There are VA loan limits per county, so just be aware of those limits and act accordingly.
3. You can do this "alternating," as you put it, but if you exceed your entitlement amount, you will have to free up your (or her) VA entitlements in order to continue as you go. Lenders would be knowledgeable about the restoration process if you decide to pursue that particular route.
4. Otherwise, tapping into equity to further grow your portfolio is an excellent way to put money to use in order to grow your wealth. Just make sure not to over-leverage, and that sentiment means something different to each individual. So, it is more a reflection rather than a hard number or percentage anyone can give to you.
Happy to discuss any of this more in depth if you ever wanted; otherwise good luck on your new endeavors.
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REALTOR® CalDRE: 02221003 | CA Bar: 322013