I want to configure my XML sync with my WP

Hi, I am looking for wordpress experience developer who can complete my below task. The website is up and running, We have an online service for real estate management (We are and real estate broker compan), and we need to synchronize. data from our online service with our site. the synchronization have to be done daily. from our online real estate management service. the issue is that xml import from file is OK, but form URL is a blank page Really important is that all the data is imported in all languages that are stored in xml file. Add on for link clocking is alsno installed, and needs to work properly 1) All fields that are available on application side have to be available on website, understandable is that some data will not be imported because are no necessary. 2) All data have to be in 4 languages (English, Croatian, Italian, German) 3) All pictures have to be imported, order of pictures is important. 4) All floor plans have to be imported. 5) I am having a problem with WP all import, Sync with URL is giving a blank page 6) Sync have to be done daily. 7) Properties have to be searchable by criteria from website (see advanced search on website) 8) Location for google maps have to be mapped, but only a wiser location, not specific address 9) Really important is that the code of the plugin and theme is not changes cause of updates Looking for only experience no time waster please. Thanks