Complex sentence: The purchase would have coincided with the purchase of PzH 2000 howitzers, but due to budget constrains at least for the time being vehicles were not purchased, however interest still remains high as Croatia has no plans to modernize or maintain M84 A4 tanks beyond 2020.
Split into simpler sentences: The purchase would have coincided with the purchase of PzH 2000 howitzers, but due to budget constrains, at least for the time being, the vehicles were not purchased. Interest still remains high however, as Croatia has no plans to modernize or maintain its M-84A4 tanks beyond 2020.