Go with LR. Make it work. Period. It is simply inefficient to have two different processing systems as what you do in the field or while travelling with one is time wasted when you come back to LR at home.
I know you have a laptop already, but for others who may have drawn to topic, consider that With price of laptops these days, if a light travel laptop with SSD is too expensive, it just makes sense even to buy an inexpensive Windows machine with a 256GB or 500GB hard drive (and most now come with larger!) just to run LR even if you are running a high end Mac system at home. Mac laptops are expensive, but the nice thing is, LR Windows and LR Mac speak the same language. Throw in your back-up drive and you are all set. And as Tony said and aduke confirmed, learn how to use Export to catalog and Import from catalog, it will make your life so much easier.
Hope this helps.