Hi. You may wish to consider a hikvision or dahua nvr along with the hikvision 2032 cameras or similar as you can them relatively cheaply from Aliexpress. If you start adding decent ip cameras to your setup you will soon be wanting to replace your old cameras pretty quickly due to the difference in quality. I believe hybrid nvrs are quite expensive or were the last time I checked and may be a waste of money if eventually you want all decent ip cameras.
You could leave your old cameras in place maybe and replace each one with an ip camera as money/time allows.
Just a thought to confuse you more!