I need two Sql's (one to set damage and one to remove abandoned bases)

[Bricktop]

Hey guys I've been reading so many posts about this and honestly I've become more confused than anything. I just want to run two events to take care of my base decay/maintenance/removal.

I already understand the basics : 

In my hive I set to -1

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I currently have this sql to set damage: 

UPDATE `object_data` SET `Damage`=0.1 WHERE `ObjectUID` <> 0 AND `CharacterID` <> 0 AND `Datestamp` < DATE_SUB(CURRENT_TIMESTAMP, INTERVAL 3 DAY) AND ( (`Inventory` IS NULL) OR (`Inventory` = '[]') )

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BUT I also found this: Is it better?

UPDATE `object_data`
SET `Damage` = IF( `Damage` = 0.0, 0.1, `Damage` + 0.1 )
WHERE `LastUpdated` <= DATE_SUB(NOW(), INTERVAL 1 DAY)
AND `Classname` REGEXP 'wall|floor|door|ladder|stair'

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I found this sql to remove the decayed / abandoned bases:

CREATE EVENT `removeObjectOld` ON SCHEDULE EVERY 1 DAY COMMENT 'Removes old objects and vehicles' DO DELETE FROM `Object_DATA` WHERE `LastUpdated` < DATE_SUB(CURRENT_TIMESTAMP, INTERVAL 24 DAY) AND `Datestamp` < DATE_SUB(CURRENT_TIMESTAMP, INTERVAL 42 DAY)

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MY GOAL: Set bases to decay daily and require maintenance ALSO to have all abandoned bases completely removed from the server after 7 days untouched.

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Not exactly sure what sql's to run here - Thanks for any assistance sorting this out ... 

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E D I T ::

This is what I'm trying - Will it work? (RUNNING ON TEST SERVER- NO BASES) Don't want to delete bases on live server by mistake.

(Every 2 hours with restart) Set damage: UPDATE `object_data`SET `Damage` = IF ( `Damage` = 0.0, 0.1, `Damage` + 0.1 ) WHERE `LastUpdated` <= DATE_SUB(NOW(), INTERVAL 1 DAY) AND `Classname` REGEXP 'wall|floor|door|ladder|stair'

(Once a day) Remove old bases: DELETE FROM `object_data` WHERE `LastUpdated` < DATE_SUB(CURRENT_TIMESTAMP, INTERVAL 7 DAY) AND `Datestamp` < DATE_SUB(CURRENT_TIMESTAMP, INTERVAL 14 DAY)

[Joshyy]

SET `Damage` = IF( `Damage` = 0.0, 0.1, `Damage` + 0.1 )
WHERE `LastUpdated` <= DATE_SUB(NOW(), INTERVAL 1 DAY)
AND `Classname` REGEXP 'wall|floor|door|ladder|stair'

That will keep adding damage to the object 

Change the 'remove old objects and vehicles' event to 7 days and you'll be all good aslong as you have the objects damage set to 0.1 or more